Description Of Item: Folding Snellen test chart, 500 x 330 mm, with astigmatic fan with rotating block axis locator. The Snellen letters are all symmetrical which enables the chart to be used by direct viewing or through a mirror. The distance units are in metres rather than feet suggesting a British origin rather than USA

Historical Significance: Ross Virgo was reported by his son to have regularly visited small communities around his home town and this item is part of his travelling equipment.

How Acquired: Donated by Bruce Virgo, son of Ross Virgo, Townsville optometrist